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Horizontal injection molding machine maintenance: injection screw, check ring and cylinder composition of the heart of the injection molding machine parts, determines the quality and efficiency of the processing, they must keep a good working state. The first to import horizontal injection molding machine in to take the necessary measures to prevent debris into the plastic non plastic material flow, and should pay attention to check the screw and barrel, check correct clearance inverse ring and cylinder, normal clearance should be sealed plastic reflow and the shear force of plasticizing required, when melt slow, melt spots and black spots, unstable should check the screw, check the wear ring and barrel or inverse forming products.
Some of the common causes of failure of imported second-hand injection molding machine and solution: the production of imported second-hand injection molding machine is not stable or not qualified, in the stable production period, emergence of unstable product quality, may be caused by improper adjustment or wear of mechanical parts.
1, screw, check ring, the wear of the cylinder.
2, the sealing ring of the injection cylinder is damaged and the inner leakage is generated.
3, heating tube temperature control is not stable.
4, pressure, speed control part of the disorder.
Noise generation of imported horizontal injection molding machine
Abnormal noise generation, said there are parts damaged or improperly adjusted, should be issued by the location of the noise to identify the cause of immediate repair.
1, lack of hydraulic oil tank, pump suction air or oil filter dirt blocking will cause the pump oil, causing bubbles in the oil discharge and the noise caused by the impact of leaf, the solution is to check the amount of oil, prevent inhalation of air and clean the oil filter.
2, high hydraulic oil viscosity, increase the flow resistance, the need to replace the appropriate hydraulic oil.
3, due to pump or motor bearing or blade damage, the deviation of the coupling of the deviation caused by noise, must be adjusted to the heart or the replacement parts.
4, the direction of the valve response failure, but the function is still in the heart, such as valve wear, internal leakage, burr blocking, movement is not flexible, the electromagnetic valve due to lack of current and failure will produce noise. The solution is to clean the spool, the spool wear to replace the new parts, the current need to be stable and adequate.
5, hydraulic components damaged or oil pipeline obstruction caused by high-speed flow of hydraulic fluid noise.
6, mechanical parts of the failure, bearing wear or mechanical lack of lubrication or parts of the loosening, should find out the reasons for the tightening or replacement parts,
Horizontal injection molding machine to ensure adequate lubrication:
High temperature causes the oil temperature is not normal increase is likely the cooling system is not normal or hydraulic components caused by heat generated in the work.
1, the cooling system is not normal
1) cooling system in short supply, such as valves not fully open, the lack of pressure or flow of the pump does not meet the needs of.
2) pipe blockage, such as filter net, cooling tower or pipe blockage.
3) the cooling water temperature is too high, such as the cooling tower cooling capacity is insufficient, or damage or the temperature is too high.
2, the hydraulic system to produce high fever
1) oil pump is damaged, the internal parts in the high speed rotation wear produce high fever.
2) the pressure adjustment is not appropriate, the hydraulic system is in a state of high pressure for a long time.
3) internal leakage, such as directional valve damage or seal ring damage to the high pressure oil flows through the small space to produce heat.